61261333619 has 2 divisors, whose sum is σ = 61261333620. Its totient is φ = 61261333618.

The previous prime is 61261333613. The next prime is 61261333633. The reversal of 61261333619 is 91633316216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61261333619 - 2¹⁶ = 61261268083 is a prime.

It is a super-2 number, since 2×61261333619² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61261333613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30630666809 + 30630666810.

It is an arithmetic number, because the mean of its divisors is an integer number (30630666810).

Almost surely, 2^61261333619 is an apocalyptic number.

61261333619 is a deficient number, since it is larger than the sum of its proper divisors (1).

61261333619 is an equidigital number, since it uses as much as digits as its factorization.

61261333619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 41.

The spelling of 61261333619 in words is "sixty-one billion, two hundred sixty-one million, three hundred thirty-three thousand, six hundred nineteen".